    <SEC-DOCUMENT>0001140361-24-050149-index.html : 20241223
    <SEC-HEADER>0001140361-24-050149.hdr.sgml : 20241223
    <ACCEPTANCE-DATETIME>20241223060120
    ACCESSION NUMBER:		0001140361-24-050149
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20250219
    FILED AS OF DATE:		20241223
    DATE AS OF CHANGE:		20241223

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			POWELL INDUSTRIES INC
    		CENTRAL INDEX KEY:			0000080420
    		STANDARD INDUSTRIAL CLASSIFICATION:	SWITCHGEAR & SWITCHBOARD APPARATUS [3613]
    		ORGANIZATION NAME:           	04 Manufacturing
    		IRS NUMBER:				880106100
    		STATE OF INCORPORATION:			NV
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12488
    		FILM NUMBER:		241569619

    	BUSINESS ADDRESS:
    		STREET 1:		8550 MOSLEY DR
    		STREET 2:		POST OFFICE BOX 12818
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77075
    		BUSINESS PHONE:		7139446900

    	MAIL ADDRESS:
    		STREET 1:		8550 MOSLEY DRIVE P O BOX 12818
    		STREET 2:		8550 MOSLEY DRIVE P O BOX 12818
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77075

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	PROCESS SYSTEMS INC
    		DATE OF NAME CHANGE:	19780926
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>PRE 14A
    <SEQUENCE>1
    <FILENAME>ny20036454x1_pre14a.htm
    <DESCRIPTION>PRE 14A
    <TEXT>
    Document 1 - file: ny20036454x1_pre14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>2
    <FILENAME>powl-20250219.xsd
    <DESCRIPTION>INLINE XBRL TAXONOMY EXTENSION - SCHEMA
    <TEXT>
    Document 2 - file: powl-20250219.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>3
    <FILENAME>powl-20250219_def.xml
    <DESCRIPTION>INLINE XBRL TAXONOMY EXTENSION - DEFINITION LINKBASE
    <TEXT>
    Document 3 - file: powl-20250219_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ny20036454x1_pc01.jpg
    <TEXT>
    Document 4 - file: ny20036454x1_pc01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ny20036454x1_pc02.jpg
    <TEXT>
    Document 5 - file: ny20036454x1_pc02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ny20036454x1_pvp01x1.jpg
    <TEXT>
    Document 6 - file: ny20036454x1_pvp01x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ny20036454x1_pvp02x1.jpg
    <TEXT>
    Document 7 - file: ny20036454x1_pvp02x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ny20036454x1_pvp03x1.jpg
    <TEXT>
    Document 8 - file: ny20036454x1_pvp03x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>10
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 10 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>13
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: FilingSummary.html

    Document 17 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>19
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>20
    <FILENAME>0001140361-24-050149-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: 0001140361-24-050149-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>ny20036454x1_pre14a_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: ny20036454x1_pre14a_htm.html

    Document 21 - RAW XML: ny20036454x1_pre14a_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>